On Woodchuck's and LC's advise, I went to Advance Auto to get a scan. One code came up which was "P0380 - Glow plug/heater circuit A malfunction". The guy cleared the code and I left. The light hasn't come back on since.
It originally came on about 1 month ago. It has been a cool summer here in PA, but I don't think ever cold enough for the glow plugs to activate. If so, might MIL come back when its cold enough for glow plugs or does the code mean something else?
Thanks for the help and have a nice day.